Set-gear for sawmills.



y H. B.. SGHBIDLBR, .SET GEAR FOB SAWMILLS. APLLIOATION FILED FEB. 7,1908.

91 6,028. Patented Mar.r23, 1909.

gnou/doa wit" mozo l @of f f f aum/nu,

'HENRY R. SCHEIDLER, OFNEWARK, OHIO.

SET-GEAR 'FOR SAWMILLS.

Specification of Letters Patent.

Patented March 23, 1.909.

Application filed February 7, 1908. Serial No. 4147.691.

T o all whom it may concern:

- Be it known that l, HENRY RSCHEIDLnn, a citizen of the United States, residing at Newark, in the county of Licking Iand State of Ohio, have invented certain new anduseful Improvements in Set-Gears -for Sawmills, of which the following is a speciiication.

My invention relates to set-gears for saw mills of that class which are adapted to control the rotation oi' a shaft which in turn con* trols the usual means for changing the position of a log on the head blocks to facilitate the cutting of the log into boards.

The chroot of my invention is to-provide a set-gear of this character of'superior construction and arrangement of parts; to provide in my set-gear improved meansufor gripping and moving'the shaft controlling dis', to so construct said means as to in sure accuracy and uniformity of operation;

to provide improved means for preventing a retrograde move-ment of the shaft controlling disk and to produce other improvements the details of which will be more fully pointed out hereinafter'.

These objects l accomplish in the manner illustrated, in the accompanying drawing, in which:

Figure 1 is a side elevation of my improved set-gear showing the/*usual log' controlling shaft in section, Fig. 2 is a plan view, and, Fig. 3 is an inner side view of the'main Clutch or friction head enlarged from that shown in Figs. 1 and 2 and showing a portion of the disk with which said clutch 4head is adapted to .enga-ge, in section.

Similar numerals refer to similar parts throughout the several views.-

1 represents the shaft, the movement of which regulates the positionof a log on the cross heads in the usual or any well known manner. On this shaft is carried a' disk 2 having short hub projections 2a.

3 and 4 represent the frame arms in which the shaft 1 is mounted, the frame arm 1 extending to a greater distance beyond the shaft than the frame. .arm 3. Upon the sha-ft 1 adjacent to the frame arm 4 is fulcrumed the `inner end of a clutch carrying armv 5. his arm 5 has vits outer and upwardly turned head portion 5a provided with a laterally extending bracket 6, to the underside of which is pivoted by means of.

a bolt 7, a friction or clutch head 8. This clutch head is bifurcated or grooved as indicated at 9, the groove or bifurcation being slightly wider than the thickness of the rim of the ldisk 2 which said groove embraces. As shown more clearly in Fig. 3 of the drawing, the clutch head 8 is provided on one side with a lateral .extension 8,

To the outturned head of the 'arm 5 is fulcrumed at l() a lever baril, the. inner end portion of which is adapted to Contact with one end of a set screw 12 which is adjustably mounted in a lug 5a which projects from the head of the arm 5 said set screw limiting the movement of said lever 11 in one direction. levers bar 11 has connectedA therewith the usual operating rod 13. y ln the'operation of imparting a partial rotation to or movement o hereinbefore set forth, the operating rod is pulled in the direction indicated by the dot-v ted arrow, causing a pressure of the inner end portion of the lever against the lateral. extension 8 a of the clutch head 8 which in turn results in twisting or swinging said clutch head on its pivot causing two of the diagonally opposed edges or ends of the walls of the vgrooves 9 to eect a biting engagement with the faces of the disk rim. This en# gagement havin taken lace and a irm hold having thus een attained by the clutch head on the disk, the continued pulling movement von the operating rod will result in a corres. onding rotary movement of the disk 2 audits shaft 1. v

ln order to provide a predetermined limitl of movement for the disk, l employI a 'fixed curved arm or sector 14, which bows upward from the .frame arm 4. Upon this sector and inthe path of the buter end of the arm 5 is mounted toslide'a stopblock 16, said stop block having its upper'and lower members connected on one side and having saidipp'er and lower members formed with lateral eX- tensions 16St on the. opposite side of the sector. rihrough these lateral extensions of the top and bottom members of the .block passes loosely a pin' 17, the lower end of which is provided with a nut adapted to engage the underside of the block extension and the upper end-of which abdve the block extension is provided with a rounded head 17 This roundedtermination of x7the in is pivoted within the cam shaped head cam lever 18. j

It will be understood that the block caribe securely set in connection with the sector at The outer end portion of the the shaft in the dil rec-tion of the full line arrow for ther purpose los @gli

` predctermined thickness, l' have formed-on the npger side of the sector e plurality of scale marks suches ere' shown 1n 2 of the drawing,.whichmerks may represent inches and frectionsthereof.

In order to prevent e retrograde or reverse movement oi the diskjzendsheft, I mount on seidsheft adjacent to the hub 2a, the inner end oi" ev clutchv arm 19, the letter having a terminal branch 19a extending at right engles with the body ofthe erm end seid branch .having pivotelly connected therewith. e grooved clutch body corresponding with the clutchhead Send the groove of which also receives the rim of the disk. Bearing against and ezfiertingv en upward pressure on" the underside of one end of the' clutch-heed 20 is the free end of e spring 21, the reinen-1 ing end of which is iixed't'o the. supporting freine. y The pressure oi the s ring 21 is such es to `retain the clutch-heed;p or: vslightly turned position so thettwo of the diegonellyopposed corners of its groove Will'h'eve a biting engagement with the sides of the disk rim. lt will be noted, however, that the pressure' of the spring 21 will not be sufficient to -produce a binding or clamping action ci' the clutch 20 4on the disk of suffi.- -cient strength or intensity to prevent. the

movement of the disk through the hereinbev iore described operetion of the lever l1, el-

. thouo'h the engagement of the clutch 2O and the disk will'be suifiicient to prevent voluntary retrograde movement of sind disk.

Toe, downward extension of the outer end.

of the erin 19,-1 pivot es indicatedparti-elly in -dotted lines and partially in full lines-in Fig. .1 of theadrewing, end-in full lines in Fig. 2, the cermsheped heed 2-2aof en outwardly extending lever bei' 22, said com shaped heed being, as shown, located be `neath that end of the clutch 20 which is .on

the o posite side of the disk from the spring '21, W ile the outer end oi' the lever 22 has its up er side in engagement with the lower end o' a set screw 23 which is vertically edy justeble in Mixed upright bracket 24. By

vturning seidv set screw downward, the cem head ofthe bar ZZrney be raised, thus overl coming the effect of the spring 21 and reg e. tipped sienes 11103115 LUI() 1)]0- vided for moving thc disk to e, predetermined.

dismiice limited by the position oi' the stopblock, but that zi, sul'licient grip ol' the Clutch 8 is :itteinedon'the disk oeforenny movement oli the letter tekes place, to insure the movementv of seid. disk without slipping, llt is well known that where mechanism is Aprovided ior the simultunous gripping :ind movement ofI the disk, u. slight slipping of the clutch on the disk sometimes results, thereby interfering with the accurate und uniform `movement oi14 the disk.

It will be observed that my improved setgeer .is simple in construction end positive in its operation.

Tvi/'lieti claim, is:

l. in :t set-gem', the combination with e shaft and ay disk carried thereon, of ain erm mounted to swing on scid shalt, n, clutchheed pivotnlly connected lwith seid urrn and adapted to .engage seid disk rim, n pivoted lever for throwing seid clutch. into engagement with saiddisk rim and for 'moving the disk, e second clutch carrying erin mounted to swing on seid shaft, e clutclbhcztd pivoted thereto, :t spring exerting 'pressure under one end ol' seid lust mentionedclutch-heed, end en adjustable cem ber lievi'ngits ceinsheped heed bearing on the underside oi the remaining end of' seid last mentioned clutch heed.

2. .in a. deviceoi the'cherncter described, the combination with. e shaft, of n disk mounted thereon, zr swinging erm also mounted upon seid shaft, e grooved clutch' will not only bc' initial movement of the lever to twist smid clutch, continued movement of smid handle serving to swing .sznd lever und move sind disk.

' In testimony whereof I :i'l'lix my signature in presence ol' two witnesses.

' HENRY R. SCHElDLER. Witnesses i 0. A. SCHEIDLEH,

RoBBINs HUNTER.

ilo 

